Some peptide-based medications, such as insulin and GLP-1 drugs, are FDA-approved and have strong scientific evidence supporting their effectiveness.

Synthetic peptides like insulin for diabetes and GLP-1 analogues for type 2 diabetes and obesity have been developed to mimic natural peptides. These drugs improve metabolism, control blood sugar, and support weight loss, with substantial clinical data backing their safety and efficacy. Their success highlights the therapeutic potential of peptides when carefully studied and regulated.